Multilayer containment and protection tube for conduits, cables and the like

Abstract

A multilayer containment and protection tube for conduits, cables and the like, includes an inner layer made of polymeric material, which is electrically at least antistatic, with a smooth internal surface, which forms a duct for supporting conduits or cables. The tube further includes one or more intermediate layers of electrically at least antistatic reinforcement, an outer layer made of electrically at least antistatic polymeric material, and a covering and finishing layer, which is electrically at least antistatic.

What is claimed is: 
     
       1. A multilayer containment and protection tube for conduits, cables and the like, comprising
 an inner layer made of polytetrafluoroethylene PTFE, which is electrically at least antistatic, with a smooth internal surface, which forms a duct for supporting conduits or cables, 
 one or more intermediate layers of electrically at least antistatic reinforcement, 
 an outer layer made of electrically at least antistatic polymeric material, and 
 a covering and finishing layer, which is electrically at least antistatic, wherein said covering and finishing layer is made of thermoplastic material, wherein said thermoplastic material of said covering and finishing layer is ultrahigh molecular weight polyethylene UHMWPE, and wherein said covering and finishing layer has a substantially smooth and glossy external surface. 
 
     
     
       2. The multilayer tube according to  claim 1 , wherein said inner layer made of polymeric material is made of a fluorinated polymer selected among FEP, MFA, PFA, ECTFE, PVDF and PTFE. 
     
     
       3. The multilayer tube according to  claim 1 , wherein said inner layer made of polymeric material is made of thermoplastic polymer. 
     
     
       4. The multilayer tube according to  claim 1 , wherein said inner layer is made of ultrahigh molecular weight thermoplastic polymer UHMWPE. 
     
     
       5. The multilayer tube according to  claim 1 , wherein said inner layer is a continuous extruded tubular element. 
     
     
       6. The multilayer tube according to  claim 1 , wherein said inner layer is electrically conducting. 
     
     
       7. The multilayer tube according to  claim 1 , wherein said one or more intermediate reinforcement layers comprise at least one textile or metallic reinforcement layer. 
     
     
       8. The multilayer tube according to  claim 1 , wherein said one or more intermediate reinforcement layers comprise two textile or metallic reinforcement layers. 
     
     
       9. The multilayer tube according to  claim 8 , wherein a filler layer made of elastomeric material is interposed between said two textile or metallic reinforcement layers. 
     
     
       10. The multilayer tube according to  claim 1 , wherein said one or more intermediate reinforcement layers comprise a reinforcement spiral. 
     
     
       11. The multilayer tube according to  claim 10 , wherein said reinforcement spiral is made of metallic material. 
     
     
       12. The multilayer tube according to  claim 10 , wherein said reinforcement spiral is made of thermoplastic material. 
     
     
       13. The multilayer tube according to  claim 1 , wherein said outer layer is electrically conducting. 
     
     
       14. The multilayer tube according to  claim 1 , wherein said thermoplastic material of said covering and finishing layer is polyethylene. 
     
     
       15. The multilayer tube according to  claim 1 , wherein said covering and finishing layer made of thermoplastic UHMWPE is electrically conducting. 
     
     
       16. The multilayer tube according to  claim 1 , wherein said covering and finishing layer made of UHMWPE is completely black. 
     
     
       17. The multilayer tube according to  claim 1 , wherein said covering and finishing layer made of UHMWPE is constituted by a matrix provided with uniformly dispersed electrically conducting bridges. 
     
     
       18. The multilayer tube according to  claim 1 , wherein said covering and finishing layer made of UHMWPE is marbled, with a carbon filler that gives it a substantially dark color.